So far it looks familiar to me as I'm a C2 long time user. I loaded up my Simple Space Shooter game to test it out. The whole game is just 37 events however the interface still says "This project exceeds the trial version's limits..." I'm assuming it's because of the groups (which should be included in trial versions as it is great for organizing a game eaven if you're limited to 100 events) Other than that the game worked and tested out ok.
I havn't been able to try it on my mobile yet... it keeps saying I need a newer version of chrome... there's no updates I can make so I'm guessing its just being picky.
I still have to give it a try on my linux comp. I'll see how that goes. I'd love to just open up a project whenever/wherever my ideas are flowing or whenever I have a break rather than wait to get home or carry a usb dongle around. The google drive/other clouds integration is golden for me.